Commit | Line | Data |
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ecc449eb KB |
1 | /*- |
2 | * Copyright (c) 1980, 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.redist.c% | |
b79f4fa9 DF |
6 | */ |
7 | ||
35371dec | 8 | #ifndef lint |
171af061 | 9 | static char sccsid[] = "@(#)misc.c 5.8 (Berkeley) %G%"; |
ecc449eb | 10 | #endif /* not lint */ |
cf8f66fb BJ |
11 | |
12 | #include "sh.h" | |
13 | ||
6e37afca | 14 | static int renum(); |
35371dec | 15 | |
6e37afca KB |
16 | int |
17 | any(s, c) | |
18 | register char *s; | |
19 | register int c; | |
35371dec | 20 | { |
6e37afca KB |
21 | if (!s) |
22 | return (0); /* Check for nil pointer */ | |
23 | while (*s) | |
24 | if (*s++ == c) | |
25 | return (1); | |
26 | return (0); | |
35371dec EW |
27 | } |
28 | ||
6e37afca KB |
29 | void |
30 | setzero(cp, i) | |
31 | char *cp; | |
32 | int i; | |
35371dec | 33 | { |
6e37afca KB |
34 | if (i != 0) |
35 | do | |
36 | *cp++ = 0; | |
37 | while (--i); | |
35371dec EW |
38 | } |
39 | ||
6e37afca KB |
40 | char * |
41 | strsave(s) | |
42 | register char *s; | |
cf8f66fb | 43 | { |
6e37afca KB |
44 | char *n; |
45 | register char *p; | |
46 | ||
47 | if (s == 0) | |
48 | s = ""; | |
49 | for (p = s; *p++;); | |
50 | n = p = (char *) xmalloc((size_t) ((p - s) * sizeof(char))); | |
51 | while (*p++ = *s++); | |
52 | return (n); | |
cf8f66fb BJ |
53 | } |
54 | ||
6e37afca KB |
55 | Char ** |
56 | blkend(up) | |
57 | register Char **up; | |
35371dec | 58 | { |
35371dec | 59 | |
6e37afca KB |
60 | while (*up) |
61 | up++; | |
62 | return (up); | |
35371dec EW |
63 | } |
64 | ||
cf8f66fb | 65 | |
6e37afca | 66 | void |
cf8f66fb | 67 | blkpr(av) |
6e37afca | 68 | register Char **av; |
cf8f66fb BJ |
69 | { |
70 | ||
6e37afca KB |
71 | for (; *av; av++) { |
72 | xprintf("%s", short2str(*av)); | |
73 | if (av[1]) | |
74 | xprintf(" "); | |
75 | } | |
cf8f66fb BJ |
76 | } |
77 | ||
6e37afca | 78 | int |
cf8f66fb | 79 | blklen(av) |
6e37afca | 80 | register Char **av; |
cf8f66fb | 81 | { |
6e37afca | 82 | register int i = 0; |
cf8f66fb | 83 | |
6e37afca KB |
84 | while (*av++) |
85 | i++; | |
86 | return (i); | |
cf8f66fb BJ |
87 | } |
88 | ||
6e37afca | 89 | Char ** |
cf8f66fb | 90 | blkcpy(oav, bv) |
6e37afca KB |
91 | Char **oav; |
92 | register Char **bv; | |
cf8f66fb | 93 | { |
6e37afca | 94 | register Char **av = oav; |
cf8f66fb | 95 | |
6e37afca KB |
96 | while (*av++ = *bv++) |
97 | continue; | |
98 | return (oav); | |
cf8f66fb BJ |
99 | } |
100 | ||
6e37afca | 101 | Char ** |
cf8f66fb | 102 | blkcat(up, vp) |
6e37afca | 103 | Char **up, **vp; |
cf8f66fb BJ |
104 | { |
105 | ||
6e37afca KB |
106 | (void) blkcpy(blkend(up), vp); |
107 | return (up); | |
cf8f66fb BJ |
108 | } |
109 | ||
6e37afca | 110 | void |
cf8f66fb | 111 | blkfree(av0) |
6e37afca | 112 | Char **av0; |
cf8f66fb | 113 | { |
6e37afca | 114 | register Char **av = av0; |
cf8f66fb | 115 | |
6e37afca KB |
116 | if (!av0) |
117 | return; | |
118 | for (; *av; av++) | |
119 | xfree((ptr_t) * av); | |
120 | xfree((ptr_t) av0); | |
cf8f66fb BJ |
121 | } |
122 | ||
6e37afca | 123 | Char ** |
cf8f66fb | 124 | saveblk(v) |
6e37afca | 125 | register Char **v; |
cf8f66fb | 126 | { |
6e37afca KB |
127 | register Char **newv = |
128 | (Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **)); | |
129 | Char **onewv = newv; | |
130 | ||
131 | while (*v) | |
132 | *newv++ = Strsave(*v++); | |
133 | return (onewv); | |
134 | } | |
cf8f66fb | 135 | |
171af061 | 136 | #ifdef NOTUSED |
6e37afca KB |
137 | char * |
138 | strstr(s, t) | |
139 | register char *s, *t; | |
140 | { | |
141 | do { | |
142 | register char *ss = s; | |
143 | register char *tt = t; | |
144 | ||
145 | do | |
146 | if (*tt == '\0') | |
147 | return (s); | |
148 | while (*ss++ == *tt++); | |
149 | } while (*s++ != '\0'); | |
150 | return ((char *) 0); | |
cf8f66fb BJ |
151 | } |
152 | ||
171af061 | 153 | #endif /* NOTUSED */ |
6e37afca KB |
154 | |
155 | #ifndef SHORT_STRINGS | |
156 | char * | |
cf8f66fb | 157 | strspl(cp, dp) |
6e37afca | 158 | char *cp, *dp; |
cf8f66fb | 159 | { |
6e37afca KB |
160 | char *ep; |
161 | register char *p, *q; | |
162 | ||
163 | if (!cp) | |
164 | cp = ""; | |
165 | if (!dp) | |
166 | dp = ""; | |
167 | for (p = cp; *p++;); | |
168 | for (q = dp; *q++;); | |
169 | ep = (char *) xmalloc((size_t) (((p - cp) + (q - dp) - 1) * sizeof(char))); | |
170 | for (p = ep, q = cp; *p++ = *q++;); | |
171 | for (p--, q = dp; *p++ = *q++;); | |
172 | return (ep); | |
cf8f66fb BJ |
173 | } |
174 | ||
6e37afca KB |
175 | #endif |
176 | ||
177 | Char ** | |
cf8f66fb | 178 | blkspl(up, vp) |
6e37afca | 179 | register Char **up, **vp; |
cf8f66fb | 180 | { |
6e37afca KB |
181 | register Char **wp = |
182 | (Char **) xcalloc((size_t) (blklen(up) + blklen(vp) + 1), | |
183 | sizeof(Char **)); | |
cf8f66fb | 184 | |
6e37afca KB |
185 | (void) blkcpy(wp, up); |
186 | return (blkcat(wp, vp)); | |
cf8f66fb BJ |
187 | } |
188 | ||
6e37afca | 189 | Char |
cf8f66fb | 190 | lastchr(cp) |
6e37afca | 191 | register Char *cp; |
cf8f66fb BJ |
192 | { |
193 | ||
6e37afca KB |
194 | if (!cp) |
195 | return (0); | |
196 | if (!*cp) | |
197 | return (0); | |
198 | while (cp[1]) | |
199 | cp++; | |
200 | return (*cp); | |
cf8f66fb BJ |
201 | } |
202 | ||
203 | /* | |
204 | * This routine is called after an error to close up | |
205 | * any units which may have been left open accidentally. | |
206 | */ | |
6e37afca | 207 | void |
cf8f66fb BJ |
208 | closem() |
209 | { | |
6e37afca | 210 | register int f; |
cf8f66fb | 211 | |
6e37afca KB |
212 | for (f = 0; f < NOFILE; f++) |
213 | if (f != SHIN && f != SHOUT && f != SHDIAG && f != OLDSTD && | |
214 | f != FSHTTY) | |
215 | (void) close(f); | |
cf8f66fb BJ |
216 | } |
217 | ||
6e37afca | 218 | void |
cf8f66fb BJ |
219 | donefds() |
220 | { | |
221 | ||
6e37afca KB |
222 | (void) close(0); |
223 | (void) close(1); | |
224 | (void) close(2); | |
225 | didfds = 0; | |
cf8f66fb BJ |
226 | } |
227 | ||
228 | /* | |
229 | * Move descriptor i to j. | |
230 | * If j is -1 then we just want to get i to a safe place, | |
231 | * i.e. to a unit > 2. This also happens in dcopy. | |
232 | */ | |
6e37afca | 233 | int |
cf8f66fb | 234 | dmove(i, j) |
6e37afca | 235 | register int i, j; |
cf8f66fb BJ |
236 | { |
237 | ||
6e37afca KB |
238 | if (i == j || i < 0) |
239 | return (i); | |
240 | if (j >= 0) { | |
241 | (void) dup2(i, j); | |
cf8f66fb | 242 | return (j); |
6e37afca KB |
243 | } |
244 | j = dcopy(i, j); | |
245 | if (j != i) | |
246 | (void) close(i); | |
247 | return (j); | |
cf8f66fb BJ |
248 | } |
249 | ||
6e37afca | 250 | int |
cf8f66fb | 251 | dcopy(i, j) |
6e37afca | 252 | register int i, j; |
cf8f66fb BJ |
253 | { |
254 | ||
6e37afca KB |
255 | if (i == j || i < 0 || j < 0 && i > 2) |
256 | return (i); | |
257 | if (j >= 0) { | |
258 | (void) dup2(i, j); | |
259 | return (j); | |
260 | } | |
261 | (void) close(j); | |
262 | return (renum(i, j)); | |
cf8f66fb BJ |
263 | } |
264 | ||
6e37afca | 265 | static int |
cf8f66fb | 266 | renum(i, j) |
6e37afca | 267 | register int i, j; |
cf8f66fb | 268 | { |
6e37afca KB |
269 | register int k = dup(i); |
270 | ||
271 | if (k < 0) | |
272 | return (-1); | |
273 | if (j == -1 && k > 2) | |
cf8f66fb | 274 | return (k); |
6e37afca KB |
275 | if (k != j) { |
276 | j = renum(k, j); | |
277 | (void) close(k); | |
278 | return (j); | |
279 | } | |
280 | return (k); | |
cf8f66fb BJ |
281 | } |
282 | ||
cf8f66fb BJ |
283 | /* |
284 | * Left shift a command argument list, discarding | |
285 | * the first c arguments. Used in "shift" commands | |
286 | * as well as by commands like "repeat". | |
287 | */ | |
6e37afca | 288 | void |
cf8f66fb | 289 | lshift(v, c) |
6e37afca KB |
290 | register Char **v; |
291 | register int c; | |
cf8f66fb | 292 | { |
6e37afca | 293 | register Char **u = v; |
cf8f66fb | 294 | |
6e37afca KB |
295 | while (*u && --c >= 0) |
296 | xfree((ptr_t) * u++); | |
297 | (void) blkcpy(v, u); | |
cf8f66fb BJ |
298 | } |
299 | ||
6e37afca | 300 | int |
cf8f66fb | 301 | number(cp) |
6e37afca | 302 | Char *cp; |
cf8f66fb | 303 | { |
6e37afca KB |
304 | if (!cp) |
305 | return(0); | |
306 | if (*cp == '-') { | |
307 | cp++; | |
308 | if (!Isdigit(*cp)) | |
309 | return (0); | |
310 | cp++; | |
311 | } | |
312 | while (*cp && Isdigit(*cp)) | |
313 | cp++; | |
314 | return (*cp == 0); | |
cf8f66fb BJ |
315 | } |
316 | ||
6e37afca | 317 | Char ** |
cf8f66fb | 318 | copyblk(v) |
6e37afca | 319 | register Char **v; |
cf8f66fb | 320 | { |
6e37afca | 321 | Char **nv = (Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **)); |
cf8f66fb | 322 | |
6e37afca | 323 | return (blkcpy(nv, v)); |
cf8f66fb BJ |
324 | } |
325 | ||
6e37afca KB |
326 | #ifndef SHORT_STRINGS |
327 | char * | |
cf8f66fb | 328 | strend(cp) |
6e37afca | 329 | register char *cp; |
cf8f66fb | 330 | { |
6e37afca | 331 | if (!cp) |
cf8f66fb | 332 | return (cp); |
6e37afca KB |
333 | while (*cp) |
334 | cp++; | |
335 | return (cp); | |
cf8f66fb BJ |
336 | } |
337 | ||
6e37afca KB |
338 | #endif /* SHORT_STRINGS */ |
339 | ||
340 | Char * | |
cf8f66fb | 341 | strip(cp) |
6e37afca | 342 | Char *cp; |
cf8f66fb | 343 | { |
6e37afca | 344 | register Char *dp = cp; |
cf8f66fb | 345 | |
6e37afca | 346 | if (!cp) |
cf8f66fb | 347 | return (cp); |
6e37afca KB |
348 | while (*dp++ &= TRIM) |
349 | continue; | |
350 | return (cp); | |
cf8f66fb BJ |
351 | } |
352 | ||
6e37afca | 353 | void |
cf8f66fb | 354 | udvar(name) |
6e37afca | 355 | Char *name; |
cf8f66fb BJ |
356 | { |
357 | ||
6e37afca KB |
358 | setname(short2str(name)); |
359 | stderror(ERR_NAME | ERR_UNDVAR); | |
cf8f66fb BJ |
360 | } |
361 | ||
6e37afca | 362 | int |
cf8f66fb | 363 | prefix(sub, str) |
6e37afca | 364 | register Char *sub, *str; |
cf8f66fb BJ |
365 | { |
366 | ||
6e37afca KB |
367 | for (;;) { |
368 | if (*sub == 0) | |
369 | return (1); | |
370 | if (*str == 0) | |
371 | return (0); | |
372 | if (*sub++ != *str++) | |
373 | return (0); | |
374 | } | |
cf8f66fb | 375 | } |